add full screen parameter for shared URLs

[treknado]

this is a dup of issue #22064
--> no answer and i cant reopen it.

Describe the feature:
Adding a URL parameter to go directly into the full screen-mode of the dashboard.
This should also work with shared URLs.

embed = true is NOT a workaround!
you cant leave the embed=true mode by pressing ESC and for example you are not able to switch over to machine learing.

Describe a specific use case for the feature:
The use case for the feature is to start a dashboard automatically in full screen without any user interaction. For example after a device restart (raspberry pi which displays kibana dashboards on a monitor).

A parameter for shared URLs would take over the manually task we need to do everyday (to enable the full screen mode after a device restart)

[elasticmachine]

Pinging @elastic/kibana-app

[bigredfrog]

+1 extensive use of stand alone dashboards on wall mounted screens and shorturls in general workflows.

Current work around is a lot of hand editing of the full URL to a minimum version with forced parameter, and that is painful.

[piellick]

So usefull for monitoring board

[janreges]

+1

[flash1293]

Seems like this PR would provide the required features: #58435

[ThomThomson]

Closing because the embed mode settings should provide the required functionality.